Search & Filtering
A ring of mean diameter 30 cm is wound with 200 turns of copper wire carrying a current of 2
A. The x-section of the magnetic material of the ring is 12 cm2 and its relative permeability is
1,000. Determine theflux through it.
3.18 The electric flux density is given as D=6ya, +2xa,+ 14xya mC/m². Determine the electric flux passing through (a) a rectangular window defined by (2, 0, 0), (0, 2, 0), (0, 2, 2), and (2, 0, 2), (b) a circle of 10-cm radius in the xy plane at z = 0, and (c) a triangular region bounded by (0.0, 0), (2, 0, 0), and (0, 2, 0).
A certain circuit has equivalent impedance Z = 3+j4 Ω, and an applied voltage
v = 50 cos( 1000t +30°) V The apparent power S is
select one:
a. 180.6L 53.13°VA
b. 302.5L53.13°VA
C. 360L 53.13°VA
d. 202.52L53.13°VA
e. 250L53.13°VA
For high -pass active filter with corner frequency 8 kHz, then R and C are:
Select one :
a. 2.5kΩ ,7.9557nF
b. 2 kΩ ,7.9557nF
c. 5kΩ ,7.9557nF
d. 10kΩ ,7.9557nF
e. 1kΩ ,7.9557nF
Measure the transient response of RL circuit where amplitude is 30V, Number of cycle is 5, on time is 20ms, R= 8Q, L=4mHC= 1μF
Design a circuit find the sum of 2 input voltages V1 and V2 op-amp may be used in inverting mode
In 3 phase system, the power was measured by using two wattmeter's method the first wattmeter's reading was 1600 Watt and the second wattmeter's reading was - 100 Watt the total power of the system is:
Select one:
A. 1600 Watt
B. 1500 Watt
C. 1700 Watt
For an iron - core transformer with Ep =200 V; Es =2400 V; and the primary coil consists of 50 turns. Find the secondary coils turns:
Select one:
A. 600 turns
B. None of these
C. 10 turns
D. 300 turns
In a balanced 3 phase negative sequence(ACB) system if the line current la A=10 L- 45 ° A.
The current in phase C equal to:
Select one:
A. 10 L100 °A
B.10 L75 °A
C. None of these
D. 10 L-165 °A
(a) A silicon pn junction at T = 300 K has a reverse-saturation current of
IS = 2 × 10−14 A. Determine the required forward-bias voltage to produce a
current of (i) ID = 50 μA and (ii) ID = 1 mA. (b) Repeat part (a) for
IS = 2 × 10−12 A
